| article html file updated | 31 August 2025 15:58 CEST | Update | https://www.mdpi.com/2218-1997/6/4/50 |
| article html file updated | 21 July 2022 00:27 CEST | Update | - |
| article html file updated | 31 March 2020 09:36 CEST | Original file | - |
| article pdf uploaded. | 31 March 2020 09:34 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/4/50/pdf |
| article xml uploaded. | 31 March 2020 09:34 CEST | Update | https://www.mdpi.com/2218-1997/6/4/50/xml |
| article xml file uploaded | 31 March 2020 09:34 CEST | Original file | - |
